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<div class="subTitle">org.apache.commons.net.ftp</div>
<h2 title="Class FTPListParseEngine" class="title">Class FTPListParseEngine</h2>
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<pre>public class <a href="../../../../../src-html/org/apache/commons/net/ftp/FTPListParseEngine.html#line.78">FTPListParseEngine</a>
extends <a href="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></pre>
<div class="block">This class handles the entire process of parsing a listing of
 file entries from the server.
 <p>
 This object defines a two-part parsing mechanism.
 <p>
 The first part is comprised of reading the raw input into an internal
 list of strings.  Every item in this list corresponds to an actual
 file.  All extraneous matter emitted by the server will have been
 removed by the end of this phase.  This is accomplished in conjunction
 with the FTPFileEntryParser associated with this engine, by calling
 its methods <code>readNextEntry()</code> - which handles the issue of
 what delimits one entry from another, usually but not always a line
 feed and <code>preParse()</code> - which handles removal of
 extraneous matter such as the preliminary lines of a listing, removal
 of duplicates on versioning systems, etc.
 <p>
 The second part is composed of the actual parsing, again in conjunction
 with the particular parser used by this engine.  This is controlled
 by an iterator over the internal list of strings.  This may be done
 either in block mode, by calling the <code>getNext()</code> and
 <code>getPrevious()</code> methods to provide "paged" output of less
 than the whole list at one time, or by calling the
 <code>getFiles()</code> method to return the entire list.
 <p>
 Examples:
 <p>
 Paged access:
 <pre>
    FTPClient f=FTPClient();
    f.connect(server);
    f.login(username, password);
    FTPListParseEngine engine = f.initiateListParsing(directory);

    while (engine.hasNext()) {
       FTPFile[] files = engine.getNext(25);  // "page size" you want
       //do whatever you want with these files, display them, etc.
       //expensive FTPFile objects not created until needed.
    }
 </pre>
 <p>
 For unpaged access, simply use FTPClient.listFiles().  That method
 uses this class transparently.</div>
<dl><dt><span class="strong">Version:</span></dt>
  <dd>$Id: FTPListParseEngine.java 1414510 2012-11-28 02:40:39Z ggregory $</dd></dl>
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<th class="colOne" scope="col">Constructor and Description</th>
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<tr class="altColor">
<td class="colOne"><code><strong><a href="../../../../../org/apache/commons/net/ftp/FTPListParseEngine.html#FTPListParseEngine(org.apache.commons.net.ftp.FTPFileEntryParser)">FTPListParseEngine</a></strong>(<a href="../../../../../org/apache/commons/net/ftp/FTPFileEntryParser.html" title="interface in org.apache.commons.net.ftp">FTPFileEntryParser</a>&nbsp;parser)</code>&nbsp;</td>
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<tr>
<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Method and Description</th>
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<tr class="altColor">
<td class="colFirst"><code><a href="../../../../../org/apache/commons/net/ftp/FTPFile.html" title="class in org.apache.commons.net.ftp">FTPFile</a>[]</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/commons/net/ftp/FTPListParseEngine.html#getFiles()">getFiles</a></strong>()</code>
<div class="block">Returns an array of FTPFile objects containing the whole list of
 files returned by the server as read by this object's parser.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code><a href="../../../../../org/apache/commons/net/ftp/FTPFile.html" title="class in org.apache.commons.net.ftp">FTPFile</a>[]</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/commons/net/ftp/FTPListParseEngine.html#getFiles(org.apache.commons.net.ftp.FTPFileFilter)">getFiles</a></strong>(<a href="../../../../../org/apache/commons/net/ftp/FTPFileFilter.html" title="interface in org.apache.commons.net.ftp">FTPFileFilter</a>&nbsp;filter)</code>
<div class="block">Returns an array of FTPFile objects containing the whole list of
 files returned by the server as read by this object's parser.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code><a href="../../../../../org/apache/commons/net/ftp/FTPFile.html" title="class in org.apache.commons.net.ftp">FTPFile</a>[]</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/commons/net/ftp/FTPListParseEngine.html#getNext(int)">getNext</a></strong>(int&nbsp;quantityRequested)</code>
<div class="block">Returns an array of at most <code>quantityRequested</code> FTPFile
 objects starting at this object's internal iterator's current position.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code><a href="../../../../../org/apache/commons/net/ftp/FTPFile.html" title="class in org.apache.commons.net.ftp">FTPFile</a>[]</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/commons/net/ftp/FTPListParseEngine.html#getPrevious(int)">getPrevious</a></strong>(int&nbsp;quantityRequested)</code>
<div class="block">Returns an array of at most <code>quantityRequested</code> FTPFile
 objects starting at this object's internal iterator's current position,
 and working back toward the beginning.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/commons/net/ftp/FTPListParseEngine.html#hasNext()">hasNext</a></strong>()</code>
<div class="block">convenience method to allow clients to know whether this object's
 internal iterator's current position is at the end of the list.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/commons/net/ftp/FTPListParseEngine.html#hasPrevious()">hasPrevious</a></strong>()</code>
<div class="block">convenience method to allow clients to know whether this object's
 internal iterator's current position is at the beginning of the list.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/commons/net/ftp/FTPListParseEngine.html#readServerList(java.io.InputStream)">readServerList</a></strong>(<a href="http://download.oracle.com/javase/1.5.0/docs/api/java/io/InputStream.html?is-external=true" title="class or interface in java.io">InputStream</a>&nbsp;stream)</code>
<div class="block"><strong>Deprecated.</strong>&nbsp;
<div class="block"><i>use <a href="../../../../../org/apache/commons/net/ftp/FTPListParseEngine.html#readServerList(java.io.InputStream, java.lang.String)"><code>readServerList(InputStream, String)</code></a> instead</i></div>
</div>
</td>
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<tr class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/commons/net/ftp/FTPListParseEngine.html#readServerList(java.io.InputStream, java.lang.String)">readServerList</a></strong>(<a href="http://download.oracle.com/javase/1.5.0/docs/api/java/io/InputStream.html?is-external=true" title="class or interface in java.io">InputStream</a>&nbsp;stream,
                            <a href="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;encoding)</code>
<div class="block">handle the initial reading and preparsing of the list returned by
 the server.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/commons/net/ftp/FTPListParseEngine.html#resetIterator()">resetIterator</a></strong>()</code>
<div class="block">resets this object's internal iterator to the beginning of the list.</div>
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<h3>Methods inherited from class&nbsp;java.lang.<a href="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></h3>
<code><a href="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#clone()" title="class or interface in java.lang">clone</a>, <a href="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#equals(java.lang.Object)" title="class or interface in java.lang">equals</a>, <a href="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#finalize()" title="class or interface in java.lang">finalize</a>, <a href="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#getClass()" title="class or interface in java.lang">getClass</a>, <a href="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#hashCode()" title="class or interface in java.lang">hashCode</a>, <a href="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#notify()" title="class or interface in java.lang">notify</a>, <a href="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#notifyAll()" title="class or interface in java.lang">notifyAll</a>, <a href="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#toString()" title="class or interface in java.lang">toString</a>, <a href="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#wait()" title="class or interface in java.lang">wait</a>, <a href="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#wait(long)" title="class or interface in java.lang">wait</a>, <a href="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#wait(long, int)" title="class or interface in java.lang">wait</a></code></li>
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<h4>FTPListParseEngine</h4>
<pre>public&nbsp;<a href="../../../../../src-html/org/apache/commons/net/ftp/FTPListParseEngine.html#line.84">FTPListParseEngine</a>(<a href="../../../../../org/apache/commons/net/ftp/FTPFileEntryParser.html" title="interface in org.apache.commons.net.ftp">FTPFileEntryParser</a>&nbsp;parser)</pre>
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<h4>readServerList</h4>
<pre>public&nbsp;void&nbsp;<a href="../../../../../src-html/org/apache/commons/net/ftp/FTPListParseEngine.html#line.100">readServerList</a>(<a href="http://download.oracle.com/javase/1.5.0/docs/api/java/io/InputStream.html?is-external=true" title="class or interface in java.io">InputStream</a>&nbsp;stream,
                  <a href="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;encoding)
                    throws <a href="http://download.oracle.com/javase/1.5.0/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
<div class="block">handle the initial reading and preparsing of the list returned by
 the server.  After this method has completed, this object will contain
 a list of unparsed entries (Strings) each referring to a unique file
 on the server.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>stream</code> - input stream provided by the server socket.</dd><dd><code>encoding</code> - the encoding to be used for reading the stream</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code><a href="http://download.oracle.com/javase/1.5.0/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code> - thrown on any failure to read from the sever.</dd></dl>
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<h4>getNext</h4>
<pre>public&nbsp;<a href="../../../../../org/apache/commons/net/ftp/FTPFile.html" title="class in org.apache.commons.net.ftp">FTPFile</a>[]&nbsp;<a href="../../../../../src-html/org/apache/commons/net/ftp/FTPListParseEngine.html#line.161">getNext</a>(int&nbsp;quantityRequested)</pre>
<div class="block">Returns an array of at most <code>quantityRequested</code> FTPFile
 objects starting at this object's internal iterator's current position.
 If fewer than <code>quantityRequested</code> such
 elements are available, the returned array will have a length equal
 to the number of entries at and after after the current position.
 If no such entries are found, this array will have a length of 0.

 After this method is called this object's internal iterator is advanced
 by a number of positions equal to the size of the array returned.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>quantityRequested</code> - the maximum number of entries we want to get.</dd>
<dt><span class="strong">Returns:</span></dt><dd>an array of at most <code>quantityRequested</code> FTPFile
 objects starting at the current position of this iterator within its
 list and at least the number of elements which  exist in the list at
 and after its current position.
 <p><b>
 NOTE:</b> This array may contain null members if any of the
 individual file listings failed to parse.  The caller should
 check each entry for null before referencing it.</dd></dl>
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<h4>getPrevious</h4>
<pre>public&nbsp;<a href="../../../../../org/apache/commons/net/ftp/FTPFile.html" title="class in org.apache.commons.net.ftp">FTPFile</a>[]&nbsp;<a href="../../../../../src-html/org/apache/commons/net/ftp/FTPListParseEngine.html#line.200">getPrevious</a>(int&nbsp;quantityRequested)</pre>
<div class="block">Returns an array of at most <code>quantityRequested</code> FTPFile
 objects starting at this object's internal iterator's current position,
 and working back toward the beginning.

 If fewer than <code>quantityRequested</code> such
 elements are available, the returned array will have a length equal
 to the number of entries at and after after the current position.
 If no such entries are found, this array will have a length of 0.

 After this method is called this object's internal iterator is moved
 back by a number of positions equal to the size of the array returned.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>quantityRequested</code> - the maximum number of entries we want to get.</dd>
<dt><span class="strong">Returns:</span></dt><dd>an array of at most <code>quantityRequested</code> FTPFile
 objects starting at the current position of this iterator within its
 list and at least the number of elements which  exist in the list at
 and after its current position.  This array will be in the same order
 as the underlying list (not reversed).
 <p><b>
 NOTE:</b> This array may contain null members if any of the
 individual file listings failed to parse.  The caller should
 check each entry for null before referencing it.</dd></dl>
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<h4>getFiles</h4>
<pre>public&nbsp;<a href="../../../../../org/apache/commons/net/ftp/FTPFile.html" title="class in org.apache.commons.net.ftp">FTPFile</a>[]&nbsp;<a href="../../../../../src-html/org/apache/commons/net/ftp/FTPListParseEngine.html#line.221">getFiles</a>()
                   throws <a href="http://download.oracle.com/javase/1.5.0/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
<div class="block">Returns an array of FTPFile objects containing the whole list of
 files returned by the server as read by this object's parser.</div>
<dl><dt><span class="strong">Returns:</span></dt><dd>an array of FTPFile objects containing the whole list of
         files returned by the server as read by this object's parser.
 None of the entries will be null</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code><a href="http://download.oracle.com/javase/1.5.0/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code> - - not ever thrown, may be removed in a later release</dd></dl>
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<h4>getFiles</h4>
<pre>public&nbsp;<a href="../../../../../org/apache/commons/net/ftp/FTPFile.html" title="class in org.apache.commons.net.ftp">FTPFile</a>[]&nbsp;<a href="../../../../../src-html/org/apache/commons/net/ftp/FTPListParseEngine.html#line.245">getFiles</a>(<a href="../../../../../org/apache/commons/net/ftp/FTPFileFilter.html" title="interface in org.apache.commons.net.ftp">FTPFileFilter</a>&nbsp;filter)
                   throws <a href="http://download.oracle.com/javase/1.5.0/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
<div class="block">Returns an array of FTPFile objects containing the whole list of
 files returned by the server as read by this object's parser.
 The files are filtered before being added to the array.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>filter</code> - FTPFileFilter, must not be <code>null</code>.</dd>
<dt><span class="strong">Returns:</span></dt><dd>an array of FTPFile objects containing the whole list of
         files returned by the server as read by this object's parser.
 <p><b>
 NOTE:</b> This array may contain null members if any of the
 individual file listings failed to parse.  The caller should
 check each entry for null before referencing it, or use the
 a filter such as <a href="../../../../../org/apache/commons/net/ftp/FTPFileFilters.html#NON_NULL"><code>FTPFileFilters.NON_NULL</code></a> which does not
 allow null entries.</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code><a href="http://download.oracle.com/javase/1.5.0/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code> - - not ever thrown, may be removed in a later release</dd><dt><span class="strong">Since:</span></dt>
  <dd>2.2</dd></dl>
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<pre>public&nbsp;boolean&nbsp;<a href="../../../../../src-html/org/apache/commons/net/ftp/FTPListParseEngine.html#line.268">hasNext</a>()</pre>
<div class="block">convenience method to allow clients to know whether this object's
 internal iterator's current position is at the end of the list.</div>
<dl><dt><span class="strong">Returns:</span></dt><dd>true if internal iterator is not at end of list, false
 otherwise.</dd></dl>
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<pre>public&nbsp;boolean&nbsp;<a href="../../../../../src-html/org/apache/commons/net/ftp/FTPListParseEngine.html#line.279">hasPrevious</a>()</pre>
<div class="block">convenience method to allow clients to know whether this object's
 internal iterator's current position is at the beginning of the list.</div>
<dl><dt><span class="strong">Returns:</span></dt><dd>true if internal iterator is not at beginning of list, false
 otherwise.</dd></dl>
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<pre>public&nbsp;void&nbsp;<a href="../../../../../src-html/org/apache/commons/net/ftp/FTPListParseEngine.html#line.286">resetIterator</a>()</pre>
<div class="block">resets this object's internal iterator to the beginning of the list.</div>
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<h4>readServerList</h4>
<pre><a href="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/Deprecated.html?is-external=true" title="class or interface in java.lang">@Deprecated</a>
public&nbsp;void&nbsp;<a href="../../../../../src-html/org/apache/commons/net/ftp/FTPListParseEngine.html#line.297">readServerList</a>(<a href="http://download.oracle.com/javase/1.5.0/docs/api/java/io/InputStream.html?is-external=true" title="class or interface in java.io">InputStream</a>&nbsp;stream)
                    throws <a href="http://download.oracle.com/javase/1.5.0/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
<div class="block"><span class="strong">Deprecated.</span>&nbsp;<i>use <a href="../../../../../org/apache/commons/net/ftp/FTPListParseEngine.html#readServerList(java.io.InputStream, java.lang.String)"><code>readServerList(InputStream, String)</code></a> instead</i></div>
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